Wear mechanisms in a hypereutectic aluminium silicon alloy sliding against steel

Wear resistance of aluminium alloy and its composites reinforced by Al2O3 particles

“…The hard reinforcing Al 2 O 3 particles resist the micro cutting action of abrasives effectively [41]. Therefore, for the composites, protrusion of hard Al 2 O 3 particles, good bonding between matrix and reinforcing particles and work hardening of matrix during the abrasion appeared to be responsible for the reduced wear volume loss [18].…”

“…High wear resistance of particulate reinforced MMCs is due to the ceramic particle content, which protects the metal matrix from wear. For aluminium alloy matrix composites reinforced with ceramic particles, it has been generally agreed that increasing the particle content can enhance wear resistance [17,18]. Therefore, the application of Al 2 O 3 or SiC particle reinforced aluminium alloy matrix composites in automotive and aircraft industries is gradually increasing for pistons, cylinder heads, connecting rods, etc.…”

Mechanical properties and fracture behavior of an ultrafine-grained Al-20 wt pct Si alloy

“…It was reported that hard primary Si particles in Al alloys help in forming a deformed layer on the worn surface [27] . A similar phenomenon was also observed in SiC-reinforced aluminum composites.…”

“…This observation is similar to the report that hypereutectic Al-Si binary alloys show a high resistance to wear due to the presence of hard primary Si particles in the soft Al matrix. [27] Results of SEM photographs recorded from the longitudinal cross sections (parallel to the worn surface) were analyzed to investigate the wear mechanism in these alloys. In the sample with Ͻ26 m powder particles, a deformed layer without any cracks has formed at 1.65 m/s sliding speed (Figure 10(a)).…”

Dry sliding wear behavior of Mg2Si/Al composites against automobile friction material

“…Dyson [3] has identified three regimes, scuffing, severe and seizure in the wear load characteristics. It is reported [4] in studies on Al-Si alloys that the transition from mild wear has been designated as metallic wear [5], scuffing [6], seizure [7] and severe wear regimes [8,9]. Somi Reddy [4] studied wear and seizure behavior of binary Al-Si alloys containing up to 23% Si against a steel disc in a pin-on-disc machine, and the characters of different wear regimes of mild wear, severe wear and seizure regimes are analyzed, proposing an Al-Si alloys wear behavior qualitative model.…”